In a chapter titled, “Checkmate”, C. S. Lewis describes his own conversion, which demonstrates that even when people make free moves, God will always checkmate them in the end.

I gave in, and admitted that God was God, and knelt and prayed: perhaps, that night, the most dejected and reluctant convert in all England … a prodigal who is brought in kicking, struggling, resentful, and darting his eyes in every direction for a chance of escape. The words compelle intrare, compel them to come in, have been so abused by wicked men that we shudder at them; but, properly understood [my emphasis], they plumb the depth of the Divine mercy. … His compulsion is our liberation.

C.S. Lewis, Surprised by Joy, 228–29

Looking back he realised that because he chose God it was free choice—an overwhelmingly superior choice. Had he rejected God, it would’ve have been because he was enslaved to a sick, sinful delusion.

… before God closed in on me, I was in fact offered what now appears a moment of wholly free choice. I say, ‘I chose,’ yet it did not really seem possible to do the opposite. … You could argue that I was not a free agent, but I am more inclined to think that this came nearer to being a perfectly free act than most that I have ever done. Necessity may not be the opposite of freedom…

C.S. Lewis, Surprised by Joy, 224

Imagine a firefighter at the top of a ladder imploring someone to escape the flames. Surely if the person “chose” not to come, they’d be considered insane—not pejoratively but literally unable to make a rational free choice? Because of this, the firefighter may need to drag them to safety so that they can come to their senses. Likewise, our loving Father doesn’t abandon us to our own misguided “choices” but instead shatters our delusions, frees us from our enslaving sin, and heals our minds. In doing so, God comes inside, lifts us up so together we can unlock the door (I highly recommend reading the article Free-will Theodicies of Hell, where Thomas Talbott fleshes this out).

Jesus is a king because his business is to bear witness to the truth. What truth? All truth; all verity of relation throughout the universe—first of all, that his father is good, perfectly good; and that the crown and joy of life is to desire and do the will of the eternal source of will, and of all life. He deals thus the death-blow to the power of hell. For the one principle of Hell is “I am my own…

Lastly, consider the context of Lewis’ MacDonald quote (“The one principle of Hell is ‘I am my own'”) at the start of his “Checkmate” chapter. Immediately preceding the bit that Lewis quoted, MacDonald explained that Jesus reveals all truth universally, including the truth that the glorious goal (“the crown”) of all life is to choose (“desire and do”) the will of God, thus defeating hell—all the deluded, sinful, egotistic pride.